Fix broken of running animation - Running animation is stop automatically after a certain time. - It is 300ms according MBScene._updateUI(). - It is caused by notification of changing DOM tree. The notification handlers would call MBScene.updateUI() to update framelines and buttons. - MBScene.updateUI() would call MBScene.show() after 300ms, MBScene.show() calls MBScene.parseScene() in turn. - MBScene.parseScene() would remove duplicate group that is using by code of running animation, MBScene.doRunNext(). It make running animation stop. - fixed by setting MBScene.lockui when a running animation is started or stoped.

#ifndef __MBBUTTON_H
#define __MBBUTTON_H
typedef struct _mb_button {
    mb_obj_t obj;
    redraw_man_t *rdman;
    int state;
    coord_t *root;
    coord_t *active;
    coord_t *normal;
    coord_t *click;
    void (*press)();
    void *arg;
    observer_t *obs_move,*obs_out,*obs_press;
    mb_progm_t *progm;
} mb_button_t;
mb_button_t *mb_button_new(redraw_man_t *rdman,mb_sprite_t *sp, char *name);
void mb_button_add_onClick(mb_button_t *b, void (*h)(void *arg), void *arg);
#endif